76
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Thirolf P, Habs D, Gross M, Allinger K, Bin J, Henig A, Kiefer D, Ma W, Schreiber J. Laser Ion Acceleration: Status and Perspectives for Fusion. EPJ WEB OF CONFERENCES 2011. [DOI: 10.1051/epjconf/20111711001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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77
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Schreiber J, Bellei C, Mangles SPD, Kamperidis C, Kneip S, Nagel SR, Palmer CAJ, Rajeev PP, Streeter MJV, Najmudin Z. Complete temporal characterization of asymmetric pulse compression in a laser wakefield. PHYSICAL REVIEW LETTERS 2010; 105:235003. [PMID: 21231474 DOI: 10.1103/physrevlett.105.235003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Indexed: 05/30/2023]
Abstract
We present complete experimental characterization of the temporal shape of an intense ultrashort 200-TW laser pulse driving a laser wakefield. The phase of the pulse was uniquely measured by using (second-order) frequency-resolved optical gating. The pulses are asymmetrically compressed and exhibit a positive chirp consistent with the expected asymmetric self-phase-modulation due to photon acceleration or deceleration in a relativistic plasma wave. The measured pulse duration decreases linearly with increasing length and density of the plasma, in quantitative agreement with the intensity-dependent group velocity variation in the plasma wave.
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78
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Conrad K, Krause G, Wagener B, Waldburg N, Hundack L, Schreiber J. Ösophagobronchiale Fistel als Komplikation einer Therapie eines zentralen Bronchialkarzinoms mit Bevacizumab (Avastin®). Pneumologie 2010. [DOI: 10.1055/s-2010-1268881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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79
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Unger C, Maas S, Hundack L, Schreiber J. Narrow Band Imaging in der bronchoskopischen Diagnostik des Bronchialkarzinoms. Pneumologie 2010. [DOI: 10.1055/s-2010-1268897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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80
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Hundack L, Langwieler S, Schelle M, Boye H, Rudloff C, Schreiber J. Langerhans-Zell-Histiozytose und Bronchialkarzinom. Pneumologie 2010. [DOI: 10.1055/s-2010-1268886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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81
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Ramakrishna B, Kar S, Robinson APL, Adams DJ, Markey K, Quinn MN, Yuan XH, McKenna P, Lancaster KL, Green JS, Scott RHH, Norreys PA, Schreiber J, Zepf M. Laser-driven fast electron collimation in targets with resistivity boundary. PHYSICAL REVIEW LETTERS 2010; 105:135001. [PMID: 21230778 DOI: 10.1103/physrevlett.105.135001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Indexed: 05/30/2023]
Abstract
We demonstrate experimentally that the relativistic electron flow in a dense plasma can be efficiently confined and guided in targets exhibiting a high-resistivity-core-low-resistivity-cladding structure analogous to optical waveguides. The relativistic electron beam is shown to be confined to an area of the order of the core diameter (50 μm), which has the potential to substantially enhance the coupling efficiency of electrons to the compressed fusion fuel in the Fast Ignitor fusion in full-scale fusion experiments.
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82
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Schreiber J, Krimstein G, Woods J. Stories of survival. Inj Prev 2010. [DOI: 10.1136/ip.2010.029215.1016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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83
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Malfertheiner MV, Kandulski A, Malfertheiner P, Schreiber J. [Bronchopulmonary manifestations of gastroesophageal reflux disease]. Internist (Berl) 2010; 51 Suppl 1:246-54. [PMID: 20098976 DOI: 10.1007/s00108-009-2506-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Gastroesophageal reflux disease (GERD) is a common disease in the western world. Usually it occurs with typical symptoms like heartburn and regurgitation, but almost every third GERD-patient presents with extraesophageal symptoms and diseases in which a causal relation with GERD is discussed. The extraesophageal symptoms possibly associated with GERD are chronic cough, bronchial asthma, sleep disturbances including obstructive sleep apnea, hoarseness, dental erosions, non-cardiac chest pain and idiopathic pulmonary fibrosis. This article gives an overview of the reflux-associated diseases of the airways as well as the proposed pathomechanisms and therapeutic options.
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84
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Schreiber J, Koschel D, Kekow J, Waldburg N, Goette A, Merget R. Rheumatoid pneumoconiosis (Caplan's syndrome). Eur J Intern Med 2010; 21:168-72. [PMID: 20493416 DOI: 10.1016/j.ejim.2010.02.004] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 11/30/2009] [Accepted: 02/10/2010] [Indexed: 11/19/2022]
Abstract
In 1953, Caplan described a characteristic radiographic pattern in coal miners with rheumatoid arthritis (RA) that was distinct from the typical progressive massive fibrosis pattern of coalworkers' pneumoconiosis. It consists of multiple well-defined rounded nodules on chest X-ray, from about 0.5 to about several centimetres in diameter, distributed throughout the lungs but predominantly at the lung periphery. Lesions appear often in crops, may coalesce and form a larger confluent nodule. Nodules often cavitate or calcify. They typically occur in the setting of pre-existing mild pneumoconiosis, but pneumoconiosis is not a prerequisite. The onset of the nodules is typically sudden, and their course varies thereafter, ranging from regression to progression. Histologically, the nodules have a characteristic appearance and are distinguishable from silicotic nodules or progressive massive fibrosis. Individual susceptibility is considered to play a role in the development of the disease. However, the pathogenetic link between exposure to silica, pneumoconiosis and RA has not been clarified conclusively. This review summarizes history, definition and current knowledge on epidemiology, pathology, pathophysiology, clinical presentation and treatment of Caplan's syndrome.
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85
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Debus AD, Bussmann M, Schramm U, Sauerbrey R, Murphy CD, Major Z, Hörlein R, Veisz L, Schmid K, Schreiber J, Witte K, Jamison SP, Gallacher JG, Jaroszynski DA, Kaluza MC, Hidding B, Kiselev S, Heathcote R, Foster PS, Neely D, Divall EJ, Hooker CJ, Smith JM, Ertel K, Langley AJ, Norreys P, Collier JL, Karsch S. Electron bunch length measurements from laser-accelerated electrons using single-shot THz time-domain interferometry. PHYSICAL REVIEW LETTERS 2010; 104:084802. [PMID: 20366938 DOI: 10.1103/physrevlett.104.084802] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Indexed: 05/29/2023]
Abstract
Laser-plasma wakefield-based electron accelerators are expected to deliver ultrashort electron bunches with unprecedented peak currents. However, their actual pulse duration has never been directly measured in a single-shot experiment. We present measurements of the ultrashort duration of such electron bunches by means of THz time-domain interferometry. With data obtained using a 0.5 J, 45 fs, 800 nm laser and a ZnTe-based electro-optical setup, we demonstrate the duration of laser-accelerated, quasimonoenergetic electron bunches [best fit of 32 fs (FWHM) with a 90% upper confidence level of 38 fs] to be shorter than the drive laser pulse, but similar to the plasma period.
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86
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Nilson PM, Mangles SPD, Willingale L, Kaluza MC, Thomas AGR, Tatarakis M, Najmudin Z, Clarke RJ, Lancaster KL, Karsch S, Schreiber J, Evans RG, Dangor AE, Krushelnick K. Generation of ultrahigh-velocity ionizing shocks with petawatt-class laser pulses. PHYSICAL REVIEW LETTERS 2009; 103:255001. [PMID: 20366258 DOI: 10.1103/physrevlett.103.255001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2009] [Indexed: 05/29/2023]
Abstract
Ultrahigh-velocity shock waves (approximately 10,000 km/s or 0.03c) are generated by focusing a 350-TW laser pulse into low-density helium gas. The collisionless ultrahigh-Mach-number electrostatic shock propagates from the plasma into the surrounding gas, ionizing gas as it becomes collisional. The shock undergoes a corrugation instability due to propagation of the ionizing shock within the gas (the Dyakov-Kontorovich instability). This system may be relevant to the study of very high-Mach-number ionizing shocks in astrophysical situations.
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Henig A, Steinke S, Schnürer M, Sokollik T, Hörlein R, Kiefer D, Jung D, Schreiber J, Hegelich BM, Yan XQ, Meyer-ter-Vehn J, Tajima T, Nickles PV, Sandner W, Habs D. Radiation-pressure acceleration of ion beams driven by circularly polarized laser pulses. PHYSICAL REVIEW LETTERS 2009; 103:245003. [PMID: 20366205 DOI: 10.1103/physrevlett.103.245003] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Indexed: 05/29/2023]
Abstract
We present experimental studies on ion acceleration from ultrathin diamondlike carbon foils irradiated by ultrahigh contrast laser pulses of energy 0.7 J focused to peak intensities of 5x10(19) W/cm2. A reduction in electron heating is observed when the laser polarization is changed from linear to circular, leading to a pronounced peak in the fully ionized carbon spectrum at the optimum foil thickness of 5.3 nm. Two-dimensional particle-in-cell simulations reveal that those C6+ ions are for the first time dominantly accelerated in a phase-stable way by the laser radiation pressure.
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Waldburg N, Hege S, Knolle J, Schreiber J. Differenzialdiagnostik pulmonaler maligner „klein-rund-und-blauzelliger“ Tumore – Ist jedes kleinzellige Karzinom ein SCLC? Pneumologie 2009. [DOI: 10.1055/s-2009-1242174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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89
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Wieczorek D, Waldburg N, Guenther G, Schreiber J. Erhöhte Inzidenz von malignen Hodentumoren bei Patienten mit Mukoviszidose? Pneumologie 2009. [DOI: 10.1055/s-2009-1242175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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90
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Malfertheiner MV, Bönigk H, Hundack L, Schreiber J. Nasale „High-flow“-Sauerstoffzufuhr – Eine Alternative bei respiratorischer Insuffizienz? Erste Fallbeispiele. Pneumologie 2009. [DOI: 10.1055/s-2009-1242164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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91
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Pearl PL, Gibson KM, Quezado Z, Dustin I, Taylor J, Trzcinski S, Schreiber J, Forester K, Reeves-Tyer P, Liew C, Shamim S, Herscovitch P, Carson R, Butman J, Jakobs C, Theodore W. Decreased GABA-A binding on FMZ-PET in succinic semialdehyde dehydrogenase deficiency. Neurology 2009; 73:423-9. [PMID: 19667317 DOI: 10.1212/wnl.0b013e3181b163a5] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE Succinic semialdehyde dehydrogenase (SSADH) deficiency is an autosomal recessive disorder of GABA metabolism characterized by elevated levels of GABA and gamma-hydroxybutyric acid. Clinical findings include intellectual impairment, hypotonia, hyporeflexia, hallucinations, autistic behaviors, and seizures. Autoradiographic labeling and slice electrophysiology studies in the murine model demonstrate use-dependent downregulation of GABA(A) receptors. We studied GABA(A) receptor activity in human SSADH deficiency utilizing [(11)C]-flumazenil (FMZ)-PET. METHODS FMZ binding was measured in 7 patients, 10 unaffected parents, and 8 healthy controls. Data analysis was performed using a reference region compartmental model, with time-activity curve from pons as the input function. Relative parametric binding potential (BP(ND)) was derived, with MRI-based pixel by pixel partial volume correction, in regions of interest drawn on coregistered MRI. RESULTS In amygdala, hippocampus, cerebellar vermis, frontal, parietal, and occipital cortex, patients with SSADH deficiency had significant reductions in FMZ BP(ND) compared to parents and controls. Mean cortical values were 6.96 +/- 0.79 (controls), 6.89 +/- 0.71 (parents), and 4.88 +/- 0.77 (patients) (F ratio 16.1; p < 0.001). There were no differences between controls and parents in any cortical region. CONCLUSIONS Succinic semialdehyde dehydrogenase (SSADH) deficient patients show widespread reduction in BZPR binding on [(11)C]-flumazenil-PET. Our results suggest that high endogenous brain GABA levels in SSADH deficiency downregulate GABA(A)-BZPR binding site availability. This finding suggests a potential mechanism for neurologic dysfunction in a serious neurodevelopmental disorder, and suggests that PET may be useful to translate studies in animal models to human disease.
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Abstract
Drug-induced alveolitis/pneumonitis and lung fibrosis are comparatively frequent manifestations of drug-induced damage to the respiratory system. These side effects rarely have pathognomonic features. Therefore, they are relevant differential diagnoses of naturally occurring pulmonary diseases. Side effects of drug therapy may mimic much of the clinical-radiological-pathological pattern of interstitial lung diseases; however, precise figures on the frequency of medicamentous induction of interstitial lung disorders are lacking. The diagnostics are based mainly on verifying a compatible disease pattern, excluding differential diagnoses, and assessing the temporal relationship and the consequences of drug abstention. Reexposure is rarely indicated. Strict elimination of the responsible drugs is the most important therapeutic measure. Additional drug therapy, mostly with glucocorticosteroids, may be indicated. This article summarizes the spectrum of drug-induced disorders of the lung parenchyma.
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93
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Henig A, Kiefer D, Markey K, Gautier DC, Flippo KA, Letzring S, Johnson RP, Shimada T, Yin L, Albright BJ, Bowers KJ, Fernández JC, Rykovanov SG, Wu HC, Zepf M, Jung D, Liechtenstein VK, Schreiber J, Habs D, Hegelich BM. Enhanced laser-driven ion acceleration in the relativistic transparency regime. PHYSICAL REVIEW LETTERS 2009; 103:045002. [PMID: 19659362 DOI: 10.1103/physrevlett.103.045002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2009] [Indexed: 05/28/2023]
Abstract
We report on the acceleration of ion beams from ultrathin diamondlike carbon foils of thickness 50, 30, and 10 nm irradiated by ultrahigh contrast laser pulses at intensities of approximately 7 x 10;{19} W/cm;{2}. An unprecedented maximum energy of 185 MeV (15 MeV/u) for fully ionized carbon atoms is observed at the optimum thickness of 30 nm. The enhanced acceleration is attributed to self-induced transparency, leading to strong volumetric heating of the classically overdense electron population in the bulk of the target. Our experimental results are supported by both particle-in-cell (PIC) simulations and an analytical model.
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94
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Kneip S, Nagel SR, Martins SF, Mangles SPD, Bellei C, Chekhlov O, Clarke RJ, Delerue N, Divall EJ, Doucas G, Ertel K, Fiuza F, Fonseca R, Foster P, Hawkes SJ, Hooker CJ, Krushelnick K, Mori WB, Palmer CAJ, Phuoc KT, Rajeev PP, Schreiber J, Streeter MJV, Urner D, Vieira J, Silva LO, Najmudin Z. Near-GeV acceleration of electrons by a nonlinear plasma wave driven by a self-guided laser pulse. PHYSICAL REVIEW LETTERS 2009; 103:035002. [PMID: 19659287 DOI: 10.1103/physrevlett.103.035002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Indexed: 05/28/2023]
Abstract
The acceleration of electrons to approximately 0.8 GeV has been observed in a self-injecting laser wakefield accelerator driven at a plasma density of 5.5x10(18) cm(-3) by a 10 J, 55 fs, 800 nm laser pulse in the blowout regime. The laser pulse is found to be self-guided for 1 cm (>10zR), by measurement of a single filament containing >30% of the initial laser energy at this distance. Three-dimensional particle in cell simulations show that the intensity within the guided filament is amplified beyond its initial focused value to a normalized vector potential of a0>6, thus driving a highly nonlinear plasma wave.
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96
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Henig A, Kiefer D, Geissler M, Rykovanov SG, Ramis R, Hörlein R, Osterhoff J, Major Z, Veisz L, Karsch S, Krausz F, Habs D, Schreiber J. Laser-driven shock acceleration of ion beams from spherical mass-limited targets. PHYSICAL REVIEW LETTERS 2009; 102:095002. [PMID: 19392529 DOI: 10.1103/physrevlett.102.095002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2008] [Indexed: 05/27/2023]
Abstract
We report on experimental studies of ion acceleration from spherical targets of diameter 15 microm irradiated by ultraintense (1x10(20) W/cm2) pulses from a 20-TW Ti:sapphire laser system. A highly directed proton beam with plateau-shaped spectrum extending to energies up to 8 MeV is observed in the laser propagation direction. This beam arises from acceleration in a converging shock launched by the laser, which is confirmed by 3-dimensional particle-in-cell simulations. The temporal evolution of the shock-front curvature shows excellent agreement with a two-dimensional radiation pressure model.
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Nürnberg F, Schollmeier M, Brambrink E, Blazević A, Carroll DC, Flippo K, Gautier DC, Geissel M, Harres K, Hegelich BM, Lundh O, Markey K, McKenna P, Neely D, Schreiber J, Roth M. Radiochromic film imaging spectroscopy of laser-accelerated proton beams. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2009; 80:033301. [PMID: 19334914 DOI: 10.1063/1.3086424] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This article reports on an experimental method to fully reconstruct laser-accelerated proton beam parameters called radiochromic film imaging spectroscopy (RIS). RIS allows for the characterization of proton beams concerning real and virtual source size, envelope- and microdivergence, normalized transverse emittance, phase space, and proton spectrum. This technique requires particular targets and a high resolution proton detector. Therefore thin gold foils with a microgrooved rear side were manufactured and characterized. Calibrated GafChromic radiochromic film (RCF) types MD-55, HS, and HD-810 in stack configuration were used as spatial and energy resolved film detectors. The principle of the RCF imaging spectroscopy was demonstrated at four different laser systems. This can be a method to characterize a laser system with respect to its proton-acceleration capability. In addition, an algorithm to calculate the spatial and energy resolved proton distribution has been developed and tested to get a better idea of laser-accelerated proton beams and their energy deposition with respect to further applications.
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98
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Schreiber J, Knolle J, Sennekamp J, Schulz KT, Hahn JU, Hering KG, Raulf-Heimsoth M, Merget R. Sub-acute occupational hypersensitivity pneumonitis due to low-level exposure to diisocyanates in a secretary. Eur Respir J 2009; 32:807-11. [PMID: 18757705 DOI: 10.1183/09031936.00060507] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
There is virtually no information in the literature about the exposure levels needed to induce hypersensitivity pneumonitis (HP) by diisocyanates. The present study reports a case of occupational HP due to diisocyanates after low-level exposure. A 53-yr-old female never-smoker developed progressive shortness of breath on exertion, cough, fatigue and flu-like symptoms shortly after she began work as a secretary of a car body repair shop. A diagnosis of HP was made 2 yrs later, based on a restrictive ventilatory defect, a reticulonodular and discrete ground-glass pattern on high-resolution computed tomography, lymphocytosis in bronchoalveolar lavage and specific immunoglobulin G antibodies to diisocyanate human serum albumin conjugates in the patient's serum. The diagnosis was confirmed by recovery after exposure cessation and deterioration after re-exposure. Ambient monitoring revealed air concentrations of different diisocyanate monomers below the detection limit in both the patient's work station and in front of the paint spray booths, with the exception of one measurement that showed 4,4-methylenediphenyl diisocyanate concentrations of 3 microg x m(-3) in front of one booth (corresponding to a total reactive isocyanate group concentration of 1 microg x m(-3)). The present authors conclude that concentrations of diisocyanates far below current exposure limits may induce hypersensitivity pneumonitis in susceptible subjects.
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Goernig M, Haueisen J, Schreiber J, Leder U, Hänninen H, Mäkelä T, Takala P, Nenonen J, Lauerma K, Knuuti J, Mäkijärvi M, Toivonen L, Katila T. Comparison of current density viability imaging at rest with FDG-PET in patients after myocardial infarction. Comput Med Imaging Graph 2008; 33:1-6. [PMID: 19008074 DOI: 10.1016/j.compmedimag.2008.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2008] [Accepted: 09/22/2008] [Indexed: 10/21/2022]
Abstract
The assessment of myocardial viability is a major diagnostic challenge in patients with coronary artery disease (CAD) after myocardial infarction. Novel threedimensional current density (CD) imaging algorithms use high-resolution magnetic field mapping to determine the electrical activity of myocardial segments at rest. We, for the first time, compared CD activity obtained with several algorithms to 18-F-fluoro-deoxyglucose positron emission tomography (FDG-PET) in evaluation of myocardial viability. Magnetic field maps were obtained in nine adult patients (pt) with CAD and a history of infarction. The criterion for non-viable myocardium was an FDG-PET uptake with less than 45% of the maximum in the respective segments. CD imaging was applied to the left ventricle by using six different methods to solve the inverse problem. Mean CD activity was calculated for a close meshed grid of 90 locations of the left ventricle. A cardiologist compared bull's eye plots of CD and FDG-PET activity by eye. Spearman's correlation coefficients and specificity at a given level of sensitivity (70%) were calculated. Bull's eye plots revealed a significant correlation of CD/PET in 5 pt and no correlation in 3 pt. One pt had a negative correlation. The six different CD reconstruction methods performed similar. While CD reconstruction has the principal potential to image viable myocardium, we found that the reconstructed CD magnitude was low in scar segments but also reduced in some segments with preserved metabolic activity under resting conditions. New vector measurement techniques, the use of additional stress testing and advances in mathematical methodology are expected to improve CD imaging in future.
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100
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Cookson PG, Brady PR, Fincher KW, Duffield PA, Smith SM, Reincke K, Schreiber J. The Basolan AS process: a new concept in wool dyeing. ACTA ACUST UNITED AC 2008. [DOI: 10.1111/j.1478-4408.1995.tb01732.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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